diff options
| author | Luca Barbato <lu_zero@gentoo.org> | 2015-09-11 05:26:35 +0200 |
|---|---|---|
| committer | Luca Barbato <lu_zero@gentoo.org> | 2015-09-14 14:48:59 +0200 |
| commit | 95a41311ac3a44773cc4dc407408aca35b1f8e26 (patch) | |
| tree | 76721374285c2f7dd9fab88826fa3a4e154085ea /libavcodec/jpeg2000.c | |
| parent | 7fb93eae43cc89bd7c1c275344e1cdbadab7155b (diff) | |
jpeg2000: Factor out band stepsize initialization
Diffstat (limited to 'libavcodec/jpeg2000.c')
| -rw-r--r-- | libavcodec/jpeg2000.c | 39 |
1 files changed, 25 insertions, 14 deletions
diff --git a/libavcodec/jpeg2000.c b/libavcodec/jpeg2000.c index a5ce8023b2..77cadd8603 100644 --- a/libavcodec/jpeg2000.c +++ b/libavcodec/jpeg2000.c @@ -195,21 +195,13 @@ void ff_jpeg2000_set_significance(Jpeg2000T1Context *t1, int x, int y, static const uint8_t lut_gain[2][4] = { { 0, 0, 0, 0 }, { 0, 1, 1, 2 } }; -static int init_band(AVCodecContext *avctx, - Jpeg2000ResLevel *reslevel, - Jpeg2000Component *comp, - Jpeg2000CodingStyle *codsty, - Jpeg2000QuantStyle *qntsty, - int bandno, int gbandno, int reslevelno, - int cbps, int dx, int dy) +static void init_band_stepsize(AVCodecContext *avctx, + Jpeg2000Band *band, + Jpeg2000CodingStyle *codsty, + Jpeg2000QuantStyle *qntsty, + int bandno, int gbandno, int reslevelno, + int cbps) { - Jpeg2000Band *band = reslevel->band + bandno; - uint8_t log2_band_prec_width, log2_band_prec_height; - int declvl = codsty->nreslevels - reslevelno; // N_L -r see ISO/IEC 15444-1:2002 B.5 - int cblkno, precno; - int nb_precincts; - int i, j; - /* TODO: Implementation of quantization step not finished, * see ISO/IEC 15444-1:2002 E.1 and A.6.4. */ switch (qntsty->quantsty) { @@ -250,6 +242,25 @@ static int init_band(AVCodecContext *avctx, band->f_stepsize *= 0.5; band->i_stepsize = band->f_stepsize * (1 << 16); +} + +static int init_band(AVCodecContext *avctx, + Jpeg2000ResLevel *reslevel, + Jpeg2000Component *comp, + Jpeg2000CodingStyle *codsty, + Jpeg2000QuantStyle *qntsty, + int bandno, int gbandno, int reslevelno, + int cbps, int dx, int dy) +{ + Jpeg2000Band *band = reslevel->band + bandno; + uint8_t log2_band_prec_width, log2_band_prec_height; + int declvl = codsty->nreslevels - reslevelno; // N_L -r see ISO/IEC 15444-1:2002 B.5 + int cblkno, precno; + int nb_precincts; + int i, j; + + init_band_stepsize(avctx, band, codsty, qntsty, bandno, gbandno, reslevelno, cbps); + /* computation of tbx_0, tbx_1, tby_0, tby_1 * see ISO/IEC 15444-1:2002 B.5 eq. B-15 and tbl B.1 |